On Mon, 23 Dec 2019 18:24:16 -0500 Eric Sokolowsky <esok...@gmail.com> wrote:
>You can use the old style of options to rotate the screen: > >DISPLAY=:0 xrandr -o left Thanks for the suggestion. I had explained in my original message how xrandr didn't work and that was why I was looking for help. It turned out that the problem was specific to the pi. It has two possible video drivers apparently and the default one does not support xrandr. I have no idea why not, nor why there are two drivers and one is apparently broken, but after switching to the other driver, everything now works. >On Fri, Dec 20, 2019 at 7:51 AM djh <x...@howorth.org.uk> wrote: > >> I've just attached a display to a Pi 3B+. It's an old display >> attached through a VGA-HDMI converter (no idea whether that's >> relevant!). I've also attached a USB keyboard, though not yet a >> mouse. >> >> I want to run the display in portrait mode. When I booted it came up >> sideways (in landscape mode) as I expected. I started trying to use >> xrandr via ssh to configure the display but haven't figured out how >> to get it to work. Here's a sample of some output: >> >> $ xrandr -display :0 --prop >> xrandr: Failed to get size of gamma for output default >> Screen 0: minimum 1280 x 1024, current 1280 x 1024, maximum 1280 x >> 1024 default connected 1280x1024+0+0 0mm x 0mm >> non-desktop: 0 >> supported: 0, 1 >> 1280x1024 0.00* >> $ xrandr -display :0 --output 'default' --rotate left >> xrandr: output default cannot use rotation "left" reflection "none" >> >> I searched but haven't found any articles that explain my problem. >> So I thought I'd try lxrandr instead. That pops up a dialog box on >> screen saying "Unable to get monitor information!" and prints an >> error on the command line: >> >> $ lxrandr --display :0 >> Can't open display >> >> Somebody then told me how to rotate it 'the pi way', by >> editing /boot/config.txt That worked, but I'd like to understand why >> the X way doesn't. I'm also unable to access the display remotely. >> From my ssh session on the pi I can launch xeyes for example: >> >> $ DISPLAY=:0 xeyes >> ^C # terminate from keyboard >> >> and I turned off access control: >> >> $ DISPLAY=:0 xhost + >> access control disabled, clients can connect from any host >> >> But I can't connect to the pi from another host: >> >> $ DISPLAY=RpiBplus:0 xeyes >> Error: Can't open display: RpiBplus:0 >> $ ping RpiBplus >> PING RpiBplus.fritz.box (192.168.1.22) 56(84) bytes of data. >> 64 bytes from RpiBplus.fritz.box (192.168.1.22): icmp_seq=1 ttl=64 >> time=0.314 ms >> $ DISPLAY=192.168.1.22:0 xeyes >> Error: Can't open display: 192.168.1.22:0 >> >> I'd appreciate any suggestion for places to look to explain this >> mystery to me, or actual solutions of course :) >> >> Thanks, Dave _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: https://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s
